Overview
This D-type spiral wound gasket with inner and outer rings is a high-performance sealing solution designed for critical flanged connections in demanding industrial environments. Engineered to meet the HG/T 20631-2009 standard, it is specifically constructed to handle high-pressure and high-temperature service in piping systems, heat exchangers, valves, and pressure vessels. The robust design ensures a leak-free seal by effectively containing the filler material and distributing bolt load evenly across the flange face.
Key Features
D-type construction with integral inner and outer containment rings Manufactured from 304 stainless steel windings for corrosion resistance
Graphite filler provides reliable sealing across a wide temperature range Carbon steel outer ring (CRS) for enhanced stability and handling Engineered for high-pressure service rated to 600 LB Designed to prevent gasket blow-out and filler extrusion under cycling conditions
Meets recognized industry standards for material and dimensional consistency
Specifications
Material: 304 Stainless Steel Windings with Graphite Filler Gasket Type: Spiral Wound, Style D with Inner and Outer Rings Nominal Pipe Size: 14 inches (DN350) Pressure Class: 600 LB Outer Ring Material: Carbon Steel (CRS) Standards: Conforms to HG/T 20631-2009 Pack Quantity: 2 gaskets per package
Applications
High-pressure process piping in chemical and petrochemical plants Flanged connections on boilers, heat exchangers, and pressure vessels
Refinery and offshore oil and gas pipeline systems
Power generation and utility service lines Any application requiring a durable, reliable seal for ANSI Class 600 flanges
